MyServlet.java Source code

Introduction

Here is the source code for MyServlet.java

Source

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;

public class MyServlet extends HttpServlet {
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, java.io.IOException {

        RequestDispatcher dispatcher = null;
        String param = request.getParameter("go");
        if (param == null)
            throw new ServletException("Missing parameter in Controller.");
        else if (param.equals("weather"))
            dispatcher = getServletContext().getNamedDispatcher("Weather");
        else if (param.equals("maps"))
            dispatcher = getServletContext().getNamedDispatcher("Maps");
        else
            throw new ServletException("Improper parameter passed to Controller.");
        /*check for a null dispatcher, then 
        dispatch the request to the correct URL*/
        if (dispatcher != null)
            dispatcher.forward(request, response);
        else
            throw new ServletException("Controller received a null dispatcher.");
    }
}